Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest reaction rate, assuming they are all at the same temperature and that each starts with the same initial concentration.
Rank from fastest to slowest reaction rate. To rank items as equivalent, overlap them.
Fraction of molecules
The exponential term in the Arrhenius equation is equal to the fraction of molecules, f, with kinetic energy greater than or equal to the activation energy:
f=e−Ea/(R⋅T)
Most scientific calculators have an exfunction as the second function of the LN button.
Part B
A certain reaction with an activation energy of 155 kJ/mol was run at 475 K and again at 495 K . What is the ratio of f at the higher temperature to f at the lower temperature?
Express your answer numerically using one significant figure.
Activation energy is the minimum required energy to start a chemical reaction. Higher the activation energy lower will be the rate of a reaction. So the reaction with activation energy of 350 KJ/mol will have lowest reaction rate where as the reaction with 50 KJ/mol activation energy will have highest reaction rate.
Reaction Rate:
50 KJ/mol > 350 KJ/mol
Based on the activation energies and frequency factors, rank the following reactions from fastest to slowest...
Electromagnetic Waves RankingA) from Fastest to slowest Rank these electromagnetic waves on the basis of their speed (in vacuum).Rank from fastest to slowest. To rank items as equivalent, overlap themyellow light ,green lights ,x ray, FM radio wave,AM radio wave,infrared lightB) Rank these electromagnetic waves on the basis of their wavelength.Rank from longest to shortest. To rank items as equivalent, overlap them.C) Rank these electromagnetic waves on the basis of their frequency.Rank from largest to smallest. To rank items as...
The wheel in the figure is rolling to the right without slipping. Rank in order, from fastest to slowest, the speeds of the points labeled 1 through 5. Rank items from fastest to slowest. To rank items as equivalent, overlap them.
The wheel in the (Figure 1) is rolling to the right without slipping. Part A Rank in order, from fastest to slowest, the speeds of the points labeled 1 through 5. Rank items from fastest to slowest. To rank items as equivalent, overlap them.
There are several factors that affect the rate of a reaction. These factors include temperature, activation energy, steric factors (orientation), and also collision frequency, which changes with concentration and phase. All the factors that affect reaction rate can be summarized in an equation called the Arrhenius equation: k=Ae−Ea/RT, where k is the rate constant, A is the frequency factor, Ea is the activation energy, R=8.314 J mol−1 K−1 is the gas constant, and T is the absolute temperature. A certain...
There are several factors that affect the rate of a reaction. These factors include temperature, activation energy, steric factors (orientation), and also collision frequency, which changes with concentration and phase. All the factors that affect reaction rate can be summarized in an equation called the Arrhenius equation: k=Ae−Ea/RT, where k is the rate constant, A is the frequency factor, Ea is the activation energy, R=8.314 J mol−1 K−1 is the gas constant, and T is the absolute temperature. A certain...
om/courses/1226339/modules/items/13744057 Modules > MasteringChemistry > MasteringChemistry Course Home <HW 09 Temperatures Catalysts and Activation Energies (Ch. 14) + The Arrhenius Equation © 2015 Review Constants | Periodic Table Part A The Arrhenius equation shows the relationship between the rate constant k and the temperature T'in kelvins and is typically written as k= de E/RT where is the gas constant (8.314 J/mol-K). A is a constant called the frequency factor, and E is the activation energy for the reaction. However, a...
To use the Arrhenius equation to calculate the activation energy. As temperature rises, the average kinetic energy of molecules increases. In a chemical reaction, this means that a higher percentage of the molecules possess the required activation energy, and the reaction goes faster. This relationship is shown by the Arrhenius equation k=Ae−Ea/RT where k is the rate constant, A is the frequency factor, Ea is the activation energy, R = 8.3145 J/(K⋅mol) is the gas constant, and T is the...
To use the Arrhenius equation to calculate the activation energy. As temperature rises, the average kinetic energy of molecules increases. In a chemical reaction, this means that a higher percentage of the molecules possess the required activation energy, and the reaction goes faster. This relationship is shown by the Arrhenius equation k=Ae−Ea/RT where k is the rate constant, A is the frequency factor, Ea is the activation energy, R = 8.3145 J/(K⋅mol) is the gas constant, and T is the...
The activation energy for the isomerization reaction of CH 3N C: CH 3 NC ⇀ CH 3C N is 161 kJ/mol, and the reaction rate constant at 600 K is 0.41 s- 1 . Calculate the Arrhenius factor A for this reaction. Calculate the rate constant for this reaction at 1000 K and assume that the activation energy and A do not change with temperature.
Learning Goal: To use the Arrhenius equation to calculate the activation energy. As temperature rises, the average kinetic energy of molecules increases. In a chemical reaction, this means that a higher percentage of the molecules possess the required activation energy, and the reaction goes faster. This relationship is shown by the Arrhenius equation k=Ae−Ea/RT where k is the rate constant, A is the frequency factor, Ea is the activation energy, R = 8.3145 J/(K⋅mol) is the gas constant, and T...